Compensation and Benefit Plans (Expense and Tax Benefits of Stock Based Compensation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 27		$ 35		$ 30
Income tax benefits related to stock compensation expense	11		14		12
Excess tax benefits (expense)	5	[1]	(6)	[1]	12	[1]
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	15	[2]	18	[2]	14	[2]
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	4	[2]	7	[2]	5	[2]
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	7	[2]	9	[2]	6	[2]
Other Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	1	[2]	1	[2]	5	[2]
Southern California Edison
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	17		19		20
Income tax benefits related to stock compensation expense	7		8		8
Excess tax benefits (expense)	2	[1]	(13)	[1]	11	[1]
Southern California Edison | Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	11	[2]	10	[2]	9	[2]
Southern California Edison | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	2	[2]	4	[2]	3	[2]
Southern California Edison | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	4	[2]	5	[2]	4	[2]
Southern California Edison | Other Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 0	[2]	$ 0	[2]	$ 4	[2]

[1] Reflected in "Settlements of stock-based compensation, net" in the financing section of Edison International's and SCE's consolidated statements of cash flows.

[2] Reflected in "Operation and maintenance" on Edison International's and SCE's consolidated statements of income.